James a



(No M6661.)

J. A. GIESEp Y KBYHOLB GUARD.

,667. Patented Nov. 6, 1694. FW/

Y E uonms PETERS ou., Fumo-umu., wAsrlNnToN D c UNITED STATES PATENT I OFFICE.

JAMES A. GIESE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE ADAMS & WESTLAKE COMPANY, OF-SAME PLACE.

KEYHoLE-GUARD.

SPECIFICATION forming part of Letters Patent No. 528,667', dated November 6, 1 894.

Application filed February 16, 1894. Serial No. 500,372' (N0 mOdelJ To al@ whom t may concern:

Be 1t known that I, J AMES A. Grnsn, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Safety Attachments for Locks, of which the following is a full, clear, and exact description, reference being had to the accompany- 1ng ,draw1ngs, forming a part of this specilicatlon.

My invention relates to safety attachments for locks, 'such as are designed for use upon the cabin or state-room doors of vessels, the doors of hotel and boarding-house apartments, and for the doors of various other classes of rooms and apartments.

Among the primary objects of my invention 1s included that of producing a safety attachment for locks which shall, under certain circumstances, eectually preventthe unlocking of the door by any other key than that actually in possessionof the occupantV of the room or apartment: furthermore, to produce attachments, for the purpose above stated, which shall be capable of application to a great variety of locks; which shall not prevent (under certain conditions) the usual working of the main locking -bolt by `the proper key; which shall be simple, strong and durable in construction, and direct, positivey and reliable in its operation. n

The above-mentioned objects, and also such others as may appear from the ensuing description, are attained bythe devices illustrated inthe accompanying drawings, in which- Figure l is an outer side elevation of part of a door and one of its jambs, having a lock applied thereto which is provided with attachments embodying my invention. Fig. 2 is an inner side elevation of the structure shown in Fig. l. Fig. 3 is an enlarged outer side elevation of the lower part of thelockcasing; the cap-plate being in position. Fig. 4 1s an enlargedouter side elevation of the lower .part of the lock; the cap-plate being removed to expose theinterior parts. Fig. 5 1s a horizontal section of the lock, takenon the line 5-5 of Fig. 3; the direction of view being downward, as indicated by the arrows applied to the section-line. Fig. 6 is a detached view, in end elevation, of the thumbbutton spindle, showing its followers. Figs. 7 and 8 are detached views, in inner and outer side elevation respectively, of the guard-slide and of the tumbler for the thumb-spindle followers.

Before describing in detail the devices shown in the drawings as embodying my invention, I desire to state that while I have shown the safety-attachments as applied to a lock which is particularly adapted for use upon the cabin or state-room doors of passonger-carrying vessels, I do not desire to conine myself at all to this precise use of the attachments.

Attachments embodying my invention are equally applicable to the doors of other rooms and apartments, and to various types of locks,

as will be readily perceived from the ensuing description.

In Figs. l and 2 of the drawings, 1 designates part of a cabin or state-room door, and 2 part of the jamb which carries the keeper 2a. A suitable face-plate 3 is shown as secured to the outer side of the door l, and the casing 4 of a lock is shown as secured upon the inner side of the door in proper proximity to the keeper 2a. A knob is shown as secured upon the outer end of a knob-spindle 6 which passes through the upper part of the face-plate 3 and alsov throughnthe lock-casing, and which carries at itsinner enda companion-knob 7. The knob-spindle is provided with the usual followers 8 engaging studs 9 on a latch-slide 10, so that when the knob-spindle is turned in either direction the latch will be retracted. Inasmuch as the knob-spindle and the latch, and also the latch-slide and its immediate accessories, have no direct relation to my invention, I have contented myself with simply showing these parts dotted in Figs. l and 2.

The lock-casing 4 is shown as shallow, and of approximately rectangular form and also as provided with a removable rectangular capplate 1l which intervenes between the inner surface of the door and the body of the lockcasiug; but it Will be clearly apparent, from the ensuing description, that the casing 4 and 'its cap-plate 1l may beof any desirable form 12 designates the main locking-bolt and 13 the tumbler therefor, this main locking-bolt being shown as located horizontally beneath the main latch-slide 10 and as movable between lower and upper guiding-lugs 14; and 15 formed upon the innei` surface of the back of the casing 4. Arecess 16 is shown as formed in the under side of the inner end of the locking-bolt 12 into which engages the fin of the locking-key.

The mainlocking-bolt tumbler 13 is shown as pivoted at its outer portion (that is, the portion which is presented toward the keeper 2a) upon a stud 16fL protruding outwardly (that is, now, toward the outside of the door) from an adjacent part of the lock-casing back. An outwardly extending stud 17 formed upon the inner end of the slide 12 protrudes into a slot in the inner end of the tumbler and acts in conjunction with a lug 18 protruding downwardly from the upper margin of the slot. A spring 19, attached at one end to the outer end of the tumbler, engages at its free end with a stud 2O on the back-plate of the lockcasing and depresses the inner end of the tumbler so as to maintain the upper margin of the tumbler-slot in engagement with the stud 18. As the key is turned, in one direction or the other, it first raises the inner end of the tumbler (by engaging the lower edge thereof) and then moves the slide and tumbler longitudinally, so as to bring the lug 1S at the opposite side of the lug 17 compared to its starting-position.

The parts above described are shown principally for purposes of illustration, so as to render clear the position and operation of my attachments in a lock; and, as before stated, wide variations of form and arrangement of the principal parts of the lock itself may exist.

21 designates the auxiliary or safety lock ing-bolt and 22 the post or spindle for said bolt. This safety locking-bolt 2l is shown as located adjacent to the lower outer corner of the lock-casing, and as having on its inner side a transverse recess or groove 23; a shoulder 24`on the outer end of the bolt serving to limit the outward movement thereof. The spindle 22 of the safety bolt 21 extends only through the inner or back wall of the casing 4 (not through the cap-plate 11 thereof) and at its inner end said spindle carries a thumbbutton 25 which protrudes into the room or apartment to the door of which the lock is applied. At one side, within the lock-casing, the spindle 22 carries a radial follower-arm 2G which constantly engages within the recess 23 of the bolt 21, so that when the spindle and arm are turned in one or the opposite direction, the bolt 21 is protracted out ot' or retracted into the casing 4.

27 designates the safety-bolt tumbler which is pivoted at its inner end upon a stud 28 carried by the main locking-bolt tumbler 13. A spring 29 which is secured at one end to the inner end of the tumbler 27, engages at free end of the tumbler 27 engages one or the i opposite side of the follower 26 and thus retains said follower and the bolt 2l at one or the other limit of their movement.

30 designates a guard-slide, the body portion of which is shown as of approximately rectangular marginal contour, but which may be of any desirable marginal contour. 'The body-portion of this guard is formed with a key-hole opening 31 and said slide is shown as located in the inner lower corner of the lock-casing. Said guard-slide 30 is shown as provided with an extension-arm 32 which pi'otrudes outwardly from the lower outer corner of the guard and toward the keeper 2a of the lock, and on its outer side (that is, the side toward the outer surface of the door) said arm 32 is provided with two lugs 33. t

In accordance with my invention, I provide the spindle 22 with an additional followerarm 34: which extends radially and opposite the arm 2G and which engages constantly between the lugs 33. The guard-slide rests and moves upon two lugs 35 located in the inner part of the lower wall of the casing, and also, when in its innermost position, said slide bears upon two lugs 36 at the lower part of the inner wall of the casing. The upper part of the guard-slide rests and moves always upon a sunken portion of the inner end of the lug 17, so that no upward displacement of the slide can occur. Inasmucli as the guardslide 30 works directly against the inner surface of the cap-plate 11, no key-ward is formed on said plate, but a key-ward 3S is located .on the inner surface of the guard-plate at a point adjacent to the key-hole 31 thereof.

A key-hole 39 is formed through the capplate 11 of the lock-casing and let it be assumed that the dooris locked bythe mainlocking-bolt 12, and also that the safety lockingbolt 21 is retracted; the occupant of the room being out of the same. wWith the safety locking-bolt retracted, the guard-slide 30 is at the outer limit of its movement, and the guardslide key-hole 31 is in register with the keyhole 39. Consequently the occupant of the room is able to insert his key through the key-holes 31 and 39 and to retract the main locking-bolt so as to gain entrance to the room. Once in the room, the occupant thereof should shut the door and, having of course previously withdrawn his key from the lock, should turn the button 25 so as to throw the safety locking-bolt 21 outward into position to lock the door. By so turning the button, the occupant moves the guard-slide 30 inward so as to carry the key-hole 3l of said slide out of register with the key-hole 39 of the lock-casing. The guard-slide 30 now closes the key-hole and no person can insert a key into the lock.

When the occupant leaves the room, he un- IOO IIO

locks the safety-bolt 2l and so moves the guard key-hole into register with the casing key-hole 39 and can then insert his key from the outside andy look the door. After this an attendant provided with a pass-key can un lock and lock the door.

Were the occupant ofthe room to inadvertently fail to lock the door after entering the room, a stranger in wrongful possession of the key could of course enter', and perhaps steal from the room, and iinally lock the door from the outside, so asto imprison the rightful occupant; provided no key-hole was provided for the inside of the lock. This can, of course, be readily prevented by an inner key-hole 40 (shown in dotted lines) formed through the back-plate of the lock-easing in register with the outer key-hole 39.

Having thus described my invention, what I claim as new therein, and desire t0 secure by Letters Patent, is-

1. A safety-locking attachment comprising asafety locking-bolt independent of the main locking-bolt, a sliding-guard arranged to cover and uncover the key-hole for the main locking-bolt, a turning-spindle carrying followers engaging the safety-bolt and guard and actuating the same, substantially as set forth.

2. A safety look-attachment, comprising a rsafety locking-bolt independent ofthe main locking-bolt, a sliding-guard for covering and uncovering the key-hole for the main lockingbolt, a turning-spindle having followers engaging the safety-bolt and guard to actuate the same, and a springpressed catch or tumbler engaging one of said spindle-followers so as to hold the same at one and the other limit of its movement, substantially as set forth.

t JAMES A. GIESE.

Witnesses: 4

JN0. L. CoNDRoN, M. E. SHIELDS. 

